42 Experts Agree: Here’s How to Start Opioid Medications in Fentanyl-Era Hospitals

Published: JAMA Network Open, May 7, 2026 | Study type: Expert consensus (Delphi method, 42 panelists) | Institution: Yale School of Medicine-led consortium

The Clinical Problem

Hospitalization is one of the highest-leverage moments for initiating medications for opioid use disorder (MOUD). Patients admitted for overdose complications, infections, or withdrawal are, by definition, in contact with the healthcare system — often the first real contact in months. Every missed initiation is a missed opportunity that may not come again.

But the fentanyl era has complicated what was already a difficult clinical task. Traditional buprenorphine induction requires that patients be in moderate withdrawal before the first dose; starting too early when fentanyl is still in the system can precipitate severe precipitated withdrawal — a medical emergency that discourages future treatment-seeking. Fentanyl’s long tissue half-life and unpredictable pharmacokinetics make the timing window harder to judge than it was with heroin.

What the Consensus Recommends

The JAMA Network Open study engaged 42 national experts in hospital-based addiction medicine in a structured Delphi consensus process. Their recommendations, now the most comprehensive practice guidance of their kind:

• High-dose buprenorphine protocols are supported for patients using high-potency synthetic opioids (HPSOs) including fentanyl. Starting at doses of 16mg or higher reduces precipitated withdrawal risk by achieving receptor saturation more rapidly.
• Low-dose buprenorphine initiation (the Bernese method) is also supported — building dose slowly over several days while the patient continues using opioids, avoiding the withdrawal window problem entirely.
• Rapid methadone initiation in the hospital setting is endorsed, with experts backing same-day dosing for patients who have opioid use disorder documented by clinical assessment.
• Long-acting injectable buprenorphine (e.g., Sublocade) was highlighted as a particularly important option for patients with unstable housing or limited ability to fill daily prescriptions — a growing proportion of those presenting to hospitals.
• Adjunctive withdrawal management with non-opioid agents (clonidine, non-opioid antiemetics) is recommended alongside MOUD initiation to improve tolerability.

Why This Matters for People in Recovery

If you or someone you care about has ever been discharged from a hospital without an offer of medication for opioid use disorder, this study is part of the structural response to that failure. Every hospital that adopts these consensus practices represents a potential turning point for patients who might not seek treatment another way.

For clinicians: these guidelines are the new floor. High-dose and low-dose buprenorphine protocols are now backed by the field’s leading voices. Programs that have not yet adapted their MOUD initiation procedures for the fentanyl era have guidance to do so.

Rize’s treatment finder can help connect people with facilities that offer hospital-to-community MOUD bridges, including outpatient programs that accept same-day referrals from inpatient teams. Find treatment near you →